summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorBecky Bruce <beckyb@kernel.crashing.org>2011-06-28 14:54:47 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-07-08 00:21:34 -0500
commit3160b09796129abc9523ea3cd1633b0faba64a02 (patch)
tree53713f22a00a100d8d1e3e2a677da26f206d9fd6
parentf6ad160e6f4f4d6933eeb82a2bfa25ea008585f0 (diff)
powerpc: Create next_tlbcam_idx percpu variable for FSL_BOOKE
This is used to round-robin TLBCAM entries. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--arch/powerpc/include/asm/mmu.h5
-rw-r--r--arch/powerpc/kernel/smp.c4
-rw-r--r--arch/powerpc/mm/mem.c9
-rw-r--r--arch/powerpc/mm/tlb_nohash.c6
4 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 4138b21ae80a..b427a55ce2ab 100644
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -115,6 +115,11 @@
#ifndef __ASSEMBLY__
#include <asm/cputable.h>
+#ifdef CONFIG_PPC_FSL_BOOK3E
+#include <asm/percpu.h>
+DECLARE_PER_CPU(int, next_tlbcam_idx);
+#endif
+
static inline int mmu_has_feature(unsigned long feature)
{
return (cur_cpu_spec->mmu_features & feature);
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 6c8e739a12da..567a1746ed74 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -305,6 +305,10 @@ struct thread_info *current_set[NR_CPUS];
static void __devinit smp_store_cpu_info(int id)
{
per_cpu(cpu_pvr, id) = mfspr(SPRN_PVR);
+#ifdef CONFIG_PPC_FSL_BOOK3E
+ per_cpu(next_tlbcam_idx, id)
+ = (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
+#endif
}
void __init smp_prepare_cpus(unsigned int max_cpus)
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index a3841bb75cbb..457dc84154ba 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -353,6 +353,15 @@ void __init mem_init(void)
}
#endif /* CONFIG_HIGHMEM */
+#if defined(CONFIG_PPC_FSL_BOOK3E) && !defined(CONFIG_SMP)
+ /*
+ * If smp is enabled, next_tlbcam_idx is initialized in the cpu up
+ * functions.... do it here for the non-smp case.
+ */
+ per_cpu(next_tlbcam_idx, smp_processor_id()) =
+ (mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY) - 1;
+#endif
+
printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
"%luk reserved, %luk data, %luk bss, %luk init)\n",
nr_free_pages() << (PAGE_SHIFT-10),
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 3722185d1865..e80ed1093e2f 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -102,6 +102,12 @@ unsigned long linear_map_top; /* Top of linear mapping */
#endif /* CONFIG_PPC64 */
+#ifdef CONFIG_PPC_FSL_BOOK3E
+/* next_tlbcam_idx is used to round-robin tlbcam entry assignment */
+DEFINE_PER_CPU(int, next_tlbcam_idx);
+EXPORT_PER_CPU_SYMBOL(next_tlbcam_idx);
+#endif
+
/*
* Base TLB flushing operations:
*